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JMVA Comprehension and Analysis

475 Software Engineering for Industry - Coursework 1

Zhongxi Ren Tianyi MaQian WangZi Wang

JMVA Introduction

JMVA An analytical evaluation tool of queuing network models using

Mean value Analysis (MVA) algorithm.

User Interaction — Wizard interface

INPUT• Workload intensities• Stations • Service demands • (What-if Analysis)• (Comments)

OUTPUTTextual• Throughput• Customers numbers• Residence time …Graphical• Performance Index

Approaches

Going Through Background Comprehending concepts of JMT and JMVA

Reading Tests Written by Author Understanding major procedure of solving

Analyzing with Stan4J Forming general overview of application

Searching & Tracing in Eclipse Finding out sequences of calling methods

Testing Units Dealing with details of codebase

Architecture of Application I

Overview of the architecture: Package View

Architecture of Application II

Deeper discovery of the architecture: MVC model

Three Main Features in JMVA

What-if Solution

Offers same what-if analysis functionalities of JSIMengineExecute faster on models of small number of workload classes

XML Usage

Automated algorithm chosen

Works as an intermediate vector for passing messages among methods

Decide which algorithm to be applied by the system automatically

Main Features — Diagram

Design and Code Evaluation

User InteractionHeuristic Evaluation :

Component DependencyStan4J： Cycles occur between several packages.

Too large classes with unrelated methods in it.

Complexity & Repetition Eclipse Metric: Nested Block Depth，McCabe Cycloramic

Complexity， Number of Parameters

CPD From PMD: Found a 525 line (3213 tokens) duplication

Programming StyleCheckstyle :

Some variables should have been set to be private,

Some method should have been set to be abstract or final

Puzzling and repeating method naming

Conclusion

We have gained a lot from it — interesting points

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